Electric heater.



G. S. HAWLEY. ELECTRIC HEATER.

APPLICATION FILED JAN. 2a, 1911.

Patented May 16, 1911.

UNITED sTATEs PATENT OFFICE.

CORNELL S. HA'W'LEY, OF ALBANY, NEW YORK, ASSIGNOR TO CONSOLIDATED GAR HEATING COMPANY, A CORPORATION OF WEST VIRGINIA.

ELECTRIC HEATER.

Patented May 16, 1911.

Application filed January 23, 1911. Serial No. 604,246.

To all whom it may concern: I

Be it known that I, CORNELL S. HAwmY, a citizen of the United States, residing at Albany, county of Albany, State of New York, haveinvented certain new and useful Improvements in Electric Heaters, the following being a full, clear, and exact disclosure of the one form of my invention which I at present deem preferable.

For a detailed description of the present form of my invention, reference may be had to the following specification and the accompanying drawings forming a part thereof, in which- Figures 1 and 2 are respectively a section and a partial front elevation of one form of my invention, and Figs. 3 and 4 are respectively a section and a partial front elevation of a modified form thereof.

My invention relates to electric heaters and particularly to such heaters for railway cars wherein the heaters are exposed to contact with the clothing of passengers and hat pins, umbrella rods and other metallic articles are likely to'he thrust through the heat openings in the casing which surrounds the heater coils.

My invention relates to a device for preventing contact with the-heater coils of such articles as might be thrust or dropped through the heat openings in the casing, and

consists in brief of a double-wall casing with an air space between the two walls and emission openings in both Walls but those in one wall so-located as to come opposite an unperforated portion of the other wall. By this means an ample outlet flow of the heated'air is permitted while no article that may be dropped or thrust through the openings in the outer casing will comein contact with the heater coils to short circuit the heater or cause injury to passengers.

Referring to the drawings, H represents an electric heater resistance of any description having its heating conductor exposed. This heater is mounted in a casing havin an outer wall A and a parallel inner wall These two walls are spaced apart by blocks d, d a suflicient distance to provide for a flow of air in accordance with the plan of emission -.opening s which may be adopted. Both walls are provided with admission openings a, a which are preferably in line with each other, as shown in Fig. 1, but which, if necessary, may be offset as in Fig. 3. Both walls are also provided with emission openingsa, a, etc., which are ona higher level than openings a, a and those in one wall are offset with respect to those in the other. In arranging these an opening in the inner wall will have 'a corresponding higher opening in the outer wall, care being taken, first,

that the openings in the inner wall are of adequate size to carry out all the heated air that is to be emitted and second that the space between the walls shall be adequate to carry the air-received from each opening in the inner wall to some opening in the outer wall with the desired degree of freedom. By this means the hot air may be distributed from the outer surface as may be desired without causing undue resistance to its flow. In Figs. land 2 the air is de livered from one side and the top of the casing while in Figs. 3 and A: it is delivered from both sides as well as the top.-

What I claim as new and desire to secure by Letters Patent is:

l. -An electric heater comprising a heatingresistance, and two inclosing walls separated from each other and from'the heating re- 'sistance by air spaces and perforated at intervalsby emission openings, the perforations in one wall being opposite an unperforated portion of the other wall, both of said walls being also provided with air admission openings.-

2. An electric heater comprising a heating resistance and two casing walls on the heat? emission side or sides se a'rated by air spaces from each other and rom the heating resistance, and perforated by emission openings at difi'erent levels, the o enings in one wall being opposite an unper orated portion of the other wall.

3. An electric heater comprising aheating resistance, a casing therefor having an outer wall perforated at intervals by emission openings and an internal Wall separated by hand, before two subscribing witnesses, this an all space from the outer one and having 20th day of January, 1911.

an un erforated portion ooposite each perfoq ration in said outer Wall, hath of said Walls CORNELL LINK being also provided with air admission \Vitnesses: openings; ROBERT MoCoonnANii,

In Witness whereof I have hereunto set my CLARENCE PALMER.

Copies of this patent may be obtaiiied for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

